CN115217862B

CN115217862B - Buffer valve, clutch hydraulic system and automobile

Info

Publication number: CN115217862B
Application number: CN202210233791.7A
Authority: CN
Inventors: 倪以艳; 张强; 张旭东; 柴博; 史亚男
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2022-03-10
Filing date: 2022-03-10
Publication date: 2024-04-19
Anticipated expiration: 2042-03-10
Also published as: CN115217862A

Abstract

The invention provides a buffer valve and a clutch hydraulic system, wherein the buffer valve comprises a valve body, a pipe body, a partition piece, an elastic piece and a buffer film; wherein, a channel is formed in the valve body, the pipe body is inserted in the channel, a flow channel and a cavity are respectively formed in the pipe body and the pipe body, a separator is arranged in the flow channel and separates a first flow channel and a second flow channel, and a first communication hole is formed on the separator; the buffer film is positioned in the cavity, and a buffer cavity communicated with the second flow passage is formed between the buffer film and the pipe body in a surrounding manner; the elastic piece is arranged between the partition piece and the pipe body and used for bearing the impact of fluid in the channel, the partition piece can compress the elastic piece in a sliding mode, so that the first flow channel is communicated with the buffer cavity, and the elastic piece can release energy to drive the partition piece to return. According to the buffer valve disclosed by the invention, fluid can directly flow from the first flow channel to the second flow channel and can flow from the buffer cavity to the second flow channel, so that multiple fluctuation working conditions can be buffered by adopting one buffer valve, the occupied space is small, and the cost is lower.

Description

Buffer valve, clutch hydraulic system and automobile

Technical Field

The invention relates to the technical field of vehicle parts, in particular to a buffer valve. Meanwhile, the invention also relates to a clutch hydraulic system applying the buffer valve and an automobile applying the clutch hydraulic system.

Background

The engine vibration is big, spare part resonance, clutch operating system can make clutch hydraulic system's fluid produce undulant to reasons such as pressure pulsation response is obvious, and this undulant can be to reducing clutch slave cylinder, master cylinder and clutch system other parts's life-span, arouse the shake of clutch pedal simultaneously, influence the travelling comfort that the driver stepped on the clutch pedal, increase the damper in clutch hydraulic system can effectual improvement this problem.

Currently, there are two main types of damper valves for clutch systems that attenuate clutch oil fluctuations: streamline buffer valve and diaphragm spring buffer valve.

The streamline buffer valve works as follows: the influence to pedal shake takes place under half linkage condition, tramples clutch pedal, and the in-process is flowed to brake fluid, and precompaction spring pre-installation force is less, precompaction spring holder and spring holder separation, and the flow passes through smoothly. When the pedal is in semi-linkage, the vibration of the clutch forms pulse hydraulic fluctuation in the oil pipe, the vibration affecting comfort is formed at the pedal by feeding back the vibration, and the vibration of the pedal is larger when the pressure is larger. When the transmitted pressure is greater than the set separation pressure of the buffer valve, the spring is compressed, the spring seat is separated from the oil outlet joint, and the passing performance of liquid quantity is increased instantaneously, so that the aim of reducing the internal pressure is fulfilled.

The working principle of the diaphragm spring type buffer valve is as follows: when the fluctuating oil flows into the buffer valve, the buffer film spring is pressed to elastically deform back and forth, so that shock waves generated in the operation of the engine can be effectively absorbed, and the clutch oil flowing out of the buffer valve assembly tends to be stable.

The streamline type buffer valve only acts on low-frequency large-amplitude oil fluctuation and acts on the clutch pedal in the return process, and the diaphragm spring type buffer valve only acts on high-frequency small-amplitude oil fluctuation. If there are more than two wave forms in the system, a single buffer valve cannot play a role in buffering, for example, the configuration of multiple buffer valves not only requires enough layout space, but also increases the cost and the weight of the system.

Disclosure of Invention

In view of the above, the present invention aims to provide a cushion valve having a good impact-cushioning effect.

In order to achieve the above purpose, the technical scheme of the invention is realized as follows:

a buffer valve comprises a valve body, a pipe body, a partition piece, an elastic piece and a buffer film;

A channel is formed in the valve body;

The pipe body is inserted in the channel, a flow channel is formed in the pipe body, a cavity is formed outside the pipe body,

The partition piece is arranged in the flow channel, a first flow channel and a second flow channel are separated in the flow channel, and a first communication part for communicating the first flow channel and the second flow channel is arranged on the partition piece;

The buffer film is positioned in the cavity, covers the outer wall of the pipe body, and forms a buffer cavity communicated with the second flow passage in an enclosing way between the buffer film and the pipe body;

The elastic piece is respectively connected with the partition piece and the pipe body and receives the impact of fluid in the channel, the partition piece can compress the elastic piece in a sliding mode, so that the first flow channel is communicated with the buffer cavity, the impact of the fluid disappears, and the elastic piece can release energy to drive the partition piece to return.

Further, the buffer film comprises a film tube sleeved outside the tube body.

Further, one end of the first flow channel, which is far away from the partition piece, is provided with a back pressure shutoff plug; the back pressure interception plug is provided with a second communication part.

Further, one end of the channel is inserted with a back pressure connector which is pressed against the back pressure interception plug.

Further, the buffer film is abutted against the inner wall of the channel by the part in the back pressure joint; and a first sealing structure for sealing a gap between the buffer film and the back pressure joint is arranged between the buffer film and the back pressure joint.

Further, the back pressure shutoff plug comprises a shutoff plate, the second communication part is arranged on the shutoff plate, and a flanging is formed at the edge of the shutoff plate; the flanging is clamped between the buffer film and the pipe body.

Further, an end of the second flow passage, which is far away from the partition, is connected to the valve body.

Further, one end of the buffer film is positioned at the connecting position between the valve body and the pipe body, and a second sealing structure for sealing a gap between the buffer film and the connecting position is arranged between the buffer film and the connecting position; and a third sealing structure for sealing a gap between the buffer film and the valve body is arranged at the other end of the buffer film.

Further, a first groove is formed at one end of the buffer film, which is close to the connecting part; the second sealing structure comprises a first sealing ring arranged in the first groove and a second sealing ring clamped between the buffer film and the connecting part.

Further, a protrusion protruding into the channel is formed on the valve body; a second groove is formed at the other end of the buffer film; the third sealing structure comprises a third sealing ring arranged in the second groove, and the third sealing ring is abutted to the protruding portion.

Further, a baffle is arranged in the pipe body, and a third communication part is arranged on the baffle; the elastic piece comprises a spring arranged in the second flow passage; one end of the spring is abutted against the partition piece, and the other end of the spring is abutted against the baffle plate.

Further, the communication areas of the first communication portion, the second communication portion, and the third communication portion are different from each other.

Further, the elastic member is slidably compressed along with the partition member, and the communication area between the first flow passage and the buffer chamber is gradually increased.

Further, a strip hole is formed in the pipe body, the first flow channel is communicated with the buffer cavity through the strip hole, and a guide sliding block embedded in the strip hole is arranged on the partition piece.

Compared with the prior art, the invention has the following advantages:

(1) According to the buffer valve, the pipe body is arranged in the channel, the buffer film which forms the buffer cavity with the pipe body in a surrounding manner is arranged in the cavity, and the partition piece and the elastic piece are arranged in the flow channel of the pipe body, so that fluid can directly flow from the first flow channel to the second flow channel, and can flow to the second flow channel through the buffer cavity, and the buffer valve can buffer low-frequency small-amplitude fluctuation, low-frequency large-amplitude fluctuation and high-frequency small-amplitude fluctuation, so that a better buffer impact effect is achieved.

(2) The buffer film comprises a film tube sleeved outside the tube body, is convenient to install and arrange, and is convenient to set buffer cavities at various positions on the periphery of the tube body, so that the impact force of fluid is convenient to buffer.

(3) The back pressure shutoff plug is arranged, so that part of fluid can be intercepted, and the flow of the fluid can be reduced.

(4) One end of the channel is inserted with a back pressure connector, which is convenient for connecting with other pipelines on one hand and fixing a back pressure shutoff plug on the other hand.

(5) The back pressure shutoff plug comprises a shutoff plate, and a flanging is formed at the edge of the shutoff plate, so that the pipe body can be fixed conveniently.

(6) And the part in the back pressure joint is used for propping the diaphragm pipe against the inner wall of the channel, and a first sealing structure is arranged between the buffer film and the back pressure joint, so that the buffer film is convenient to fix and seal.

(7) One end of the second flow channel far away from the partition piece is connected to the valve body, and the assembly is convenient.

(8) The second sealing structure and the third sealing structure are respectively arranged at the two ends of the buffer film, so that a good sealing effect can be achieved.

(9) One end of the buffer film, which is close to the connecting part, forms a first groove, so that the first sealing ring and the second sealing ring are conveniently arranged, and the connecting part of the valve body and the pipe body can be well sealed.

(10) The valve body is provided with a protruding part, so that the buffer film is convenient to arrange, and the third sealing structure is convenient to arrange.

(11) The baffle is arranged on the pipe body, so that the elastic piece is convenient to arrange.

(12) The communication areas of the first communication part, the second communication part and the third communication part are different from each other, so that a good impact buffering effect can be achieved.

(13) The elastic piece is compressed along with the sliding of the separation piece, the communication area of the first flow passage and the buffer cavity is gradually enlarged, and the impact-reducing device has a good impact-reducing effect.

(14) Set up rectangular hole on the body to set up the guide block of embedding rectangular hole on the separator, be convenient for guide the separator and slide, and can make first runner through rectangular hole and buffer chamber intercommunication because of the separator slides, overall structure is comparatively simple, and the arrangement space is less.

Another object of the present invention is to propose a clutch hydraulic system comprising a hydraulic circuit in which a trim valve as described above is provided.

A further object of the invention is to propose an automobile comprising a clutch hydraulic system as described above.

According to the clutch hydraulic system and the automobile, the buffer valve can buffer low-frequency small-amplitude fluctuation, low-frequency large-amplitude fluctuation and high-frequency small-amplitude fluctuation, so that the clutch hydraulic system and the automobile have a good impact buffering effect, and are small in occupied space and low in cost and weight.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

FIG. 1 is a schematic diagram of a buffer valve according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is an exploded view of a damper valve according to an embodiment of the present invention without a valve body and a tube body;

FIG. 4 is a schematic view of a valve body according to an embodiment of the present invention;

FIG. 5 is a schematic view of the structure of FIG. 4 at another view angle;

FIG. 6 is a schematic view of a buffer valve according to an embodiment of the present invention without a valve body and a buffer film;

FIG. 7 is a cross-sectional view of a buffer film according to an embodiment of the present invention;

FIG. 8 is a schematic view of a separator according to an embodiment of the present invention;

Fig. 9 is a schematic structural diagram of a back pressure shutoff plug according to an embodiment of the invention.

Reference numerals illustrate:

1. A valve body; 2. a tube body; 3. a partition; 4. an elastic member; 5. a buffer film; 6. a back pressure shutoff plug; 7. a back pressure joint; 8. a fourth seal ring; 9. a first seal ring; 10. a second seal ring; 11. building a compression joint; 12. a third seal ring;

101. A flow passage; 102. a buffer chamber; 103. a cavity; 104. a protruding portion;

1011. a first flow passage; 1012. a second flow passage;

201. a baffle; 2011. a third communication hole; 202. a slit hole;

301. a first communication hole; 302. a guide block;

501. a first groove; 502. a second groove;

601. a shutoff plate; 6011. a second communication hole; 602. and (5) flanging.

Detailed Description

It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.

In the description of the present invention, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", "back", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In addition, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly, unless otherwise specifically defined. For example, the connection can be fixed connection, detachable connection or integrated connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in combination with specific cases.

The invention will be described in detail below with reference to the drawings in connection with embodiments.

Example 1

The embodiment relates to a buffer valve, which mainly comprises a valve body 1, a pipe body 2, a partition piece 3, an elastic piece 4 and a buffer film 5, wherein a channel is formed in the valve body 1, the pipe body 2 is inserted into the channel, a flow channel 101 is formed in the pipe body 2, and a cavity 103 is formed outside the pipe body 2; the partition 3 is arranged in the flow channel 101 in the pipe body 2, a first flow channel 1011 and a second flow channel 1012 are separated in the flow channel 101, and a first communicating part which can communicate the first flow channel 1011 and the second flow channel 1012 is arranged on the partition 3; the buffer film 5 is positioned in the cavity 103, covers the outer wall of the pipe body 2, and forms a buffer cavity 102 between the buffer film 5 and the pipe body 2 in a surrounding way, and is communicated with the second flow channel 1012; the elastic member 4 is connected to the partition member 3 and the pipe body 2, respectively.

The elastic element 4 can be compressed by sliding the partition element 3 to enable the first flow channel 1011 to be communicated with the buffer cavity 102 after the impact of the fluid in the channel is received, and the elastic element 4 can be released to drive the partition element 3 to return along with the disappearance of the impact of the fluid.

Based on the above description of the overall structure, an exemplary structure in the applied state of the cushion valve of the present embodiment is shown in fig. 1 to 2, which sequentially includes, from outside to inside, a valve body 1, a cushion film 5, and a pipe body 2, and a partition member 3 and an elastic member 4 are provided in a flow passage 101 of the pipe body 2, and a back pressure joint 7 is provided at one end of the valve body 1, and a pressure build joint 11 is provided at the other end.

It should be noted that the back pressure connector 7 may be used as a part of the buffer valve, the back pressure connector 7 may be disposed on a connecting member to be connected to the buffer valve, the pressure build-up connector 11 may be used as a part of the buffer valve, and the pressure build-up connector 11 may be disposed on a connecting member to be connected to the buffer valve.

In order to facilitate a better understanding of the buffer valve of the present embodiment, the structure of the valve body 1 will be briefly described with reference to fig. 3 to 6. As a preferred embodiment, the valve body 1 is sleeve-shaped, a through passage is formed in the valve body 1, and both ends thereof are respectively connected to the back pressure joint 7 and the pressure building joint 11. Also formed in the channel is a projection 104, which projection 104 projects into the channel, thereby facilitating the placement of a third seal ring 12 described below.

The pipe body 2 is arranged in the channel of the valve body 1 and is arranged at a distance from the inner wall of the valve body 1 to form a buffer cavity 102, and a flow channel 101 for fluid to flow through is formed in the pipe body 2. Preferably, one end of the pipe body 2 is integrally connected to the inner wall of the valve body 1, that is, one end of the second flow passage 1012, which is far from the partition 3, is connected to the inner wall of the valve body 1, so that the valve body 1 and the pipe body 2 are in an integrally formed structure. It should be noted that, besides the valve body 1 and the pipe body 2 may be integrally formed, the two may be separately manufactured and then connected together, but the processing process is relatively complex.

As a preferred embodiment, a baffle 201 is provided in the pipe body 2 near the connection portion of the valve body 1 and the pipe body 2, and may be integrally formed in the baffle 201 or may be detachably connected to the pipe body 2. The baffle 201 is provided with a third communication portion, in this embodiment, the third communication portion is preferably three third communication holes 2011 arranged in a triangle, but the number of the third communication holes 2011 can be any other number, for example, one, two, four, etc.

The side wall of the tube 2 is provided with a plurality of elongated holes 202 for communicating the buffer chamber 102 and the flow channel 101, which are described below, as a preferred embodiment, the elongated holes 202 are plural, the length directions of the elongated holes 202 are consistent with the axial direction of the tube 2, and the elongated holes 202 are circumferentially spaced around the tube 2. In this embodiment, the number of the elongated holes 202 is four, but the number of the elongated holes 202 can be any other number, such as one, two, three, five, etc.

It should be noted that, in this embodiment, it is needless to say that, instead of providing the elongated hole 202 on the tube body 2, for example, other shapes and/or numbers of holes may be provided on the tube body 2, and other guiding structures may be provided between the partition member 3 and the tube body 2, for example, guiding posts are provided on the inner wall of the tube body 2, grooves are provided on the outer periphery of the partition member 3, the grooves and the guiding posts are engaged with each other to guide the partition member 3 to slide along the axial direction of the tube body 2, at this time, the other holes are provided so that the second flow passage 1012 is communicated with the buffer chamber 102, and when the partition member 3 slides to compress the elastic member 4, the first flow passage 1011 is communicated with the buffer chamber 102, and a preferred arrangement mode is provided so that the communication area between the first flow passage 1011 and the buffer chamber 102 becomes larger gradually.

Fig. 8 shows a specific structure of the separator 3, and as a preferred embodiment, the separator 3 preferably employs a partition plate, a first communication portion is provided in the middle of the partition plate, and preferably, one first communication hole 301 is provided in the first communication portion, but other numbers of the first communication holes 301 may be provided, for example, two, three, or the like. The guide blocks 302 are formed around the partition plate, the number of the guide blocks 302 corresponds to the number of the strip holes 202 one by one, and each guide block 302 is inserted into the corresponding strip hole 202, so that the guide blocks 302 slide along the length direction of the strip hole 202, and the partition piece 3 can be guided to slide in the flow channel 101.

The arrangement of the above structure allows the first flow passage 1011 to communicate with the buffer chamber 102 through the elongated hole 202 while compressing the elastic member 4 by sliding with the partition 3, and the communication area between the first flow passage 1011 and the buffer chamber 102 becomes larger, thereby better buffering the fluctuation of the fluid.

Due to the arrangement of the partition 3 in the flow channel 101, in the state shown in fig. 2, the partition 3 may partition the flow channel 101 into a first flow channel 1011 located on the left side of the partition 3 and a second flow channel 1012 located on the right side of the partition 3.

The elastic member 4 is preferably a spring provided in the second flow passage 1012, and one end of the spring abuts against the partition 3 and the other end abuts against the baffle 201. When the fluid flow rate is large and the impact to the right is large on the separator 3, the separator 3 can slide to the right, the spring can be compressed to store energy, and when the impact to the right is small, the spring can release energy to slide to the left and restore the separator 3.

As a preferred embodiment, the buffer film 5 may be constructed as shown in fig. 7, which includes a diaphragm tube sleeved outside the tube body 2. One end of the diaphragm pipe is positioned at the connecting position between the valve body 1 and the pipe body 2, a second sealing structure for sealing a gap between the diaphragm pipe and the connecting position is arranged between the diaphragm pipe and the connecting position, and a third sealing structure for sealing a gap between the diaphragm pipe and the valve body 1 is arranged at the other end of the diaphragm pipe.

In a specific structure, a first groove 501 is formed at one end of the diaphragm pipe, which is close to the connection portion between the valve body 1 and the pipe body 2, and is formed by continuously bending one end of the diaphragm pipe inwards, and the aforementioned second sealing structure includes a first sealing ring 9 disposed in the first groove 501, and a second sealing ring 10 interposed between the diaphragm pipe and the connection portion.

The other end of the diaphragm tube is formed with a second groove 502, which is formed by continuously bending the other end of the diaphragm tube outwards, opposite to the one end where the first groove 501 is formed, the third sealing structure includes a third sealing ring 12 disposed in the second groove 502, and the third sealing ring 12 abuts against the protruding portion 104.

As a preferred embodiment, the end of the first flow channel 1011 away from the partition 3 is provided with a back pressure shutoff plug 6, and a second communication portion is provided on the back pressure shutoff plug 6. In a specific structure, as shown in fig. 9, the back pressure shutoff plug 6 includes a shutoff plate 601, a second communication portion adopts a second communication hole 6011 provided on the shutoff plate 601, and a flange 602 is formed at an edge of the shutoff plate 601, and the flange 602 is sandwiched between the diaphragm pipe and the pipe body 2, so that the diaphragm pipe is fixed conveniently. In the above structure, the number of the second communication holes 6011 is preferably four, but it may of course be set to other numbers, such as one, three, five, or the like.

In the above structure, the communication areas of the first communication portion, the second communication portion and the third communication portion are different from each other, as in the present embodiment, the communication area of the first communication portion is smaller than the communication area of the second communication portion, and the communication area of the second communication portion is smaller than the communication area of the third communication portion, so that the effect of better buffering fluid impact can be achieved. In addition, the communication areas of the communication portions may be irregularly arranged, but it should be noted that the communication areas of the communication portions should be ensured to be different from each other so as to better buffer the impact.

In addition, in the actual arrangement, besides the communication area of each communication part, the center position of each communication part can be changed, and as in the embodiment, the communication parts are provided with the communication holes with the central lines not in the same line, so that the better impact buffering is also facilitated.

Still referring to fig. 2, a back pressure connector 7 is inserted at one end of the channel, and an interference connection is preferably adopted between the back pressure connector 7 and the valve body 1, so that the back pressure connector can press against the back pressure shutoff plug 6 and is used for fixing the back pressure shutoff plug 6.

As a preferred embodiment, the part of the back pressure fitting 7 abuts the buffer membrane 5 against the inner wall of the channel to facilitate the mounting of the buffer membrane 5. As in the present embodiment, a part of the back pressure joint 7 is inserted into the diaphragm pipe, and a first sealing structure for sealing the gap between the diaphragm pipe and the back pressure joint 7 is provided between them. In this structure, preferably, a groove is formed on the outer wall of the back pressure connector 7, and the first sealing structure adopts a fourth sealing ring 8 embedded in the groove, so that the mounting position of the back pressure shutoff plug 6 can be limited, the diaphragm pipe can be fixed, and the fourth sealing ring 8 can be pressed through the insertion of the back pressure connector 7 in the channel.

The trim valve of the present embodiment, which can be connected to the hydraulic line of the clutch hydraulic system as described in the second embodiment, is generally applied to the following four working conditions:

In the first working condition, when the buffer valve is applied to the low-frequency small-amplitude fluctuation working condition, the fluctuation liquid flows through the second communication hole 6011 of the back pressure shutoff plug 6 to enter the first flow passage 1011, then flows through the first communication hole 301 on the partition piece 3 to enter the second flow passage 1012, then flows through the third communication hole 2011 on the baffle 201 and flows out through the pressure building joint 11, and the fluctuation is changed in the flow cross section area due to the fact that the fluctuation passes through the first flow passage 1011 and the second flow passage 1012, so that the fluctuation of fluid is relieved, and when the buffer valve is applied to a clutch hydraulic system described below, the clutch pedal cannot shake due to the fluctuation of system fluid.

In the second working condition, when the buffer valve is applied to the working condition of low-frequency large-amplitude fluctuation, the partition piece 3 is pushed by the large-amplitude fluctuation to compress the spring, and the spring stores energy in the process that the partition piece 3 slides rightwards to compress the spring, at this time, the communication area of the first flow channel 1011 and the buffer cavity 102 is enlarged, a large amount of fluid flows into the buffer cavity 102 instantly, so that the fluid flowing into the first flow channel 1011 can flow into the second flow channel 1012 through the buffer cavity 102, and in the process, the spring is compressed and deformed to absorb the fluctuation energy, and further the fluctuation of the fluid is relieved.

And in the third working condition, when the buffer valve is applied to the working condition of high-frequency small-amplitude fluctuation, the fluid flowing into the buffer cavity 102 can flap the diaphragm pipe, and the diaphragm pipe deforms to absorb energy, so that the fluctuation of the fluid is relieved.

And in the fourth working condition, when the buffer valve is applied to the working condition with low-frequency large-amplitude and high-frequency small-amplitude fluctuation, the fluctuation of the fluid can be attenuated in a fluctuation mode of the second working condition and the third working condition.

Finally, it should be noted that, in this embodiment, the buffer film 5 preferably includes a diaphragm tube, but the buffer film 5 may not use a diaphragm tube, for example, it may use a sheet structure that is covered and connected to the outside of the tube body 2, so that the buffer cavity 102 is formed between the buffer film 5 and the tube body 2. The buffer chamber 102 is not the aforementioned circular cylindrical buffer chamber 102, so when the elongated hole 202 is provided, the elongated hole 202 should be able to communicate the second flow channel 1012 with the second buffer chamber 102, and when the partition 3 slides to compress the spring, the elongated hole 202 is able to communicate the first flow channel 1011 with the buffer chamber 102, which also has the effect of buffering various fluctuations, but may have a poor buffering effect compared to the structure using the diaphragm tube.

In practical application, the buffer valve of the embodiment can directly flow from the first flow channel 1011 to the second flow channel 1012, and can also flow from the buffer cavity 102 to the second flow channel 1012, and can buffer low-frequency small-amplitude fluctuation, low-frequency large-amplitude fluctuation and high-frequency small-amplitude fluctuation, so that the buffer valve occupies a small space, is low in cost and has good practicability.

Example two

The present embodiment relates to a clutch hydraulic system including a hydraulic line in which a trim valve as in the first embodiment is provided. The structure of the hydraulic line of the clutch hydraulic system can be referred to the existing structure, and the present embodiment will not be described in detail.

Meanwhile, the embodiment also relates to an automobile, which comprises the clutch hydraulic system. According to the clutch hydraulic system and the automobile, the buffer valve is adopted, so that the buffer valve occupies a small space, low-frequency small-amplitude fluctuation, low-frequency large-amplitude fluctuation and high-frequency small-amplitude fluctuation can be buffered, cost can be saved, and the clutch hydraulic system and the automobile have good practicability.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims

1. A cushion valve, characterized by:

comprises a valve body (1), a pipe body (2), a partition piece (3), an elastic piece (4) and a buffer film (5);

a channel is formed in the valve body (1);

the pipe body (2) is inserted in the channel, a flow channel (101) is formed in the pipe body (2), a cavity (103) is formed outside the pipe body (2),

The separator (3) is arranged in the flow channel (101) and separates a first flow channel (1011) and a second flow channel (1012) in the flow channel (101), and a first communication part for communicating the first flow channel (1011) and the second flow channel (1012) is arranged on the separator (3);

The buffer film (5) is positioned in the cavity (103) and is covered on the outer wall of the pipe body (2), and a buffer cavity (102) communicated with the second flow channel (1012) is formed between the buffer film (5) and the pipe body (2) in a surrounding way;

The elastic piece (4) is respectively connected with the partition piece (3) and the pipe body (2) and receives the impact of fluid in the channel, the partition piece (3) can compress the elastic piece (4) in a sliding mode, so that the first flow channel (1011) is communicated with the buffer cavity (102) and disappears along with the impact of the fluid, and the elastic piece (4) can be released to drive the partition piece (3) to return.

2. The cushion valve according to claim 1, wherein:

The buffer film (5) comprises a film tube sleeved outside the tube body (2).

3. The cushion valve according to claim 1, wherein:

One end of the first flow channel (1011) far away from the partition piece (3) is provided with a back pressure shutoff plug (6);

and a second communication part is arranged on the back pressure shutoff plug (6).

4. A cushion valve according to claim 3, wherein:

One end of the channel is inserted with a back pressure joint (7) which is pressed against the back pressure interception plug (6).

5. The cushion valve according to claim 4, wherein:

the buffer film (5) is abutted against the inner wall of the channel by the part in the back pressure joint (7);

A first sealing structure for sealing a gap between the buffer film (5) and the back pressure joint (7) is arranged between the buffer film and the back pressure joint.

6. A cushion valve according to claim 3, wherein:

the back pressure shutoff plug (6) comprises a shutoff plate (601), the second communication part is arranged on the shutoff plate (601), and a flanging (602) is formed at the edge of the shutoff plate (601);

The flanging (602) is clamped between the buffer film (5) and the pipe body (2).

7. The cushion valve according to claim 1, wherein:

an end of the second flow passage (1012) remote from the partition (3) is connected to the valve body (1).

8. The cushion valve according to claim 1, wherein:

one end of the buffer film (5) is positioned at the connecting position between the valve body (1) and the pipe body (2), and a second sealing structure for sealing a gap between the buffer film (5) and the connecting position is arranged between the buffer film and the pipe body;

The other end of the buffer film (5) is provided with a third sealing structure for sealing a gap between the buffer film (5) and the valve body (1).

9. The cushion valve of claim 8, wherein:

a first groove (501) is formed at one end of the buffer film (5) close to the connecting part;

the second sealing structure comprises a first sealing ring (9) arranged in the first groove (501) and a second sealing ring (10) clamped between the buffer film (5) and the connecting part.

10. The cushion valve of claim 8, wherein:

A bulge (104) protruding into the channel is formed on the valve body (1);

A second groove (502) is formed at the other end of the buffer film (5);

The third sealing structure comprises a third sealing ring (12) arranged in the second groove (502), and the third sealing ring (12) is abutted to the protruding portion (104).

11. A cushion valve according to claim 3, wherein:

A baffle (201) is arranged in the pipe body (2), and a third communication part is arranged on the baffle (201);

The elastic piece (4) comprises a spring arranged in the second flow channel (1012);

one end of the spring is abutted against the partition (3), and the other end is abutted against the baffle (201).

12. The cushion valve according to claim 11, wherein:

The communication areas of the first communication part, the second communication part and the third communication part are different from each other.

13. The cushion valve according to any one of claims 1-12, wherein:

the elastic member (4) is slidably compressed along with the partition member (3), and the communication area between the first flow passage (1011) and the buffer chamber (102) is gradually increased.

14. The cushion valve according to claim 13, wherein:

The pipe body (2) is provided with a strip hole, the first flow channel (1011) is communicated with the buffer cavity (102) through the strip hole, and the partition piece (3) is provided with a guide sliding block (302) embedded in the strip hole.

15. A clutch hydraulic system comprising a hydraulic line, characterized in that:

the hydraulic line is provided with a trim valve according to any one of claims 1-14.

16. An automobile, characterized in that: comprising the clutch hydraulic system of claim 15.